JP2000157346A - Surface plate structure in furnature and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a surface plate in furniture having beauty and excellent resistance against wear by making a synthetic resin sheet made of a polyolefin film adhere closely from a surface of a base member 2 having a side face like projecting curve to the side face thereof. SOLUTION: Four peripheries of a synthetic resin sheet 3 are mounted on a clamp frame 12 above a base member 2 attached to an elevating base 13, and a heater 17 is turned ON while a part above the synthetic resin sheet 3 is covered with a lid chamber 16 to heat the synthetic resin sheet 3. The synthetic resin sheet 3 is softened as temperature rises, and the softened synthetic resin sheet 3 is held so as to keep substantially horizontal condition by pouring compressed air into a chamber box 11 because a central part of the synthetic resin sheet 3 tends to hang down on an inside diameter side of the clamp frame 12. Next, the elevating base 13 is raised in the chamber box 11, air pressure in the chamber box 11 is reduced down to atmospheric pressure at the same time, and the synthetic resin sheet in substantially melted condition adheres closely on a top face and a side face of the base member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a surface plate for furniture such as a desk top plate whose surface is covered with a synthetic resin sheet and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventional steel and plywood desk tops are:
Usually, a decorative plate made of a melamine resin is stuck to the surface of a steel or plywood base plate via an adhesive so that the surface is not easily damaged. In addition, by covering the side edge of the base plate and the decorative plate with an edge member made of synthetic resin along the side edge of the base plate, it is possible to prevent an external article from colliding with the side edge. Was.

According to this configuration, a minute gap is formed between the edge of the decorative plate and the edge member, and the desk top plate does not have a sense of unity.
There was a problem that the appearance was not good. In order to solve this inconvenience, Japanese Utility Model Application Laid-Open No. 5-23944 discloses that a tabletop plate is composed of a flat base material and a curved base material having a convex curved surface adhered to the periphery thereof. In some cases, an edge portion of a decorative board made of a synthetic resin or the like that comes first is formed in a thin shape, and the thin portion is adhered and fixed along the convex curved surface of the curved substrate.

[0004]

However, when the decorative board is formed to be thin only in the peripheral portion, for example, when the decorative board is formed of a laminated sheet, the number of sheets is reduced only in the thin portion, There were problems such as poor abrasion resistance and scratch resistance. There is also a problem that it is difficult to separate the base plate from the decorative plate firmly bonded at the time of disposal.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and to provide a structure of a surface plate in furniture having good aesthetics and excellent abrasion resistance.

[0006]

According to a first aspect of the present invention, there is provided a furniture according to the present invention, wherein the synthetic resin sheet is a base sheet comprising a polyolefin sheet laminated in two or three layers. A surface sheet having wear resistance is laminated on the surface of the base material, and an adhesive layer is applied to the back surface of the base sheet, and the synthetic resin sheet is integrally adhered to the front side and the side of the base member in furniture such as a table. It is characterized by wearing.

[0007] The invention described in claim 2 is the first invention.
In the surface plate structure of the furniture according to the above, the base sheet, a random or homopolyolefin sheet is laminated on the upper and lower surfaces of the amorphous polyolefin sheet, a printing layer between the surface side of the base sheet and the top sheet Alternatively, while an aluminum sheet is interposed, the adhesive layer on the back side of the base sheet is patterned so as to have a deaeration passage.

According to a third aspect of the present invention, there is provided a method of manufacturing a surface plate in furniture, wherein the synthetic resin sheet in a heated state is brought into vacuum contact with a surface and side surfaces of a base member in furniture arranged in a vacuum forming machine. After that, the base member is wrapped and pressed on at least the side surface of the base member having a three-dimensional curved surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a desk top plate in an office or meeting desk as an example of a surface plate will be described. FIG. 1 shows a desk top 1 in a meeting desk, and FIG. 2 shows an enlarged cross-sectional view of the desk top 1, which is integrated over a flat surface 2a of a base member 2 and a three-dimensionally curved side surface 2b. Specifically, a laminated synthetic resin sheet 3 described later is bonded and fixed by a vacuum forming method.

In the present embodiment, the base member 2 is formed of a fiber board or an insulation board obtained by compression-molding a laminated wood or a wood chip.
The four side edges and four corners of a are formed on the convexly curved side surface 2b. The base member 2 may be formed of a metal plate instead of wood. The synthetic resin sheet 3 has a three-layer base sheet 4
And a surface sheet 5 made of a synthetic resin material having high abrasion resistance on the front side of the base sheet 4 and an adhesive layer 6 formed on the back side of the base sheet 4 (see FIG. 3). ).

The base sheet 4 has a first layer sheet 4a and a third layer 4c made of a random polymer or a homopolymer or the like, and a highly dimensionally stable polypropylene-based resin film, a second layer 4b (the first layer sheet 4a and the The layer interposed between the third layer 4c and the third layer 4c is made of a non-crystalline amorphous polypropylene film. The second layer 4b is a layer having high elasticity, and the second layer 4b is sandwiched between the first layer 4a and the third layer 4c having high dimensional stability, so that the vacuum formability afterwards is high. Become.

The polyolefin resin refers to a crystalline phase of a polyolefin polymer which is a kind of thermoplastic elastomer, and includes a polyethylene resin (PE) and a polypropylene resin (PP). In this embodiment, the polyolefin resin is based on a propylene monomer. Crystalline polyolefin resin. The topsheet 5 is an ionomer film or an EVOH film (having a thickness of about 80 μm) having good abrasion resistance, and a polyester film coat for improving scratch resistance and a UV coat of an epoxy resin may be applied thereon. In addition,
In this embodiment, the thickness of the synthetic resin sheet 3 as a whole is 0.
It is about 8mm.

An adhesive layer 6 for improving the adhesiveness to the base member 2 is provided on the back surface of the base sheet 4. In this case, when the synthetic resin sheet 3 is adhered to the base member 2 by a vacuum forming method by forming the adhesive material in a diffusive pattern such as a dot shape or a large number of parallel fine lines, the surface of the base member 2 and the synthetic resin sheet 3 A so-called deaeration passage is formed in the adhesive layer 6 so that air bubbles do not remain between the pressure-sensitive adhesive layer 6 and the back surface of the adhesive layer 6.

As another embodiment, a printed layer 7 such as a grain pattern may be formed in advance on the surface of the third layer 4c in the base sheet 4 or on the back of the topsheet 5, Although not shown, an aluminum sheet may be interposed between the third layer 4c and the topsheet 5 to improve the performance. Next, the vacuum forming method will be described. As shown in FIG. 4 (a), the vacuum forming apparatus 10 has a clamp frame 12 disposed on the upper end of a chamber box 11, and the four circumferences of the synthetic resin sheet 3 are placed on the clamp frame 12 so that the adhesive layer 6 is directed downward. And attach it. A base member 2 which is an article to which the synthetic resin sheet 3 is to be attached is fixed on a lift 13 in the chamber box 11. The elevating table 13 is moved up and down by a certain height by a driving means (not shown), for example, an air cylinder or the like.

The chamber box 11 is provided with a vacuum pipe 14 connected to a vacuum generator (not shown) and a pressure-intensifying pipe 15 connected to a compressed air generator, each of which is provided with a stopper valve 14a, 15a. I have. A heater 17 such as an infrared lamp is arranged in a lid chamber 16 on the chamber box 11. First, as shown in FIG. 4A, the base member 2 attached to the elevating table 13 is set so as to be at a lower position, and the clamp frame 12
The heater 17 is turned on in a state where the synthetic resin sheet 3 is mounted around the circumference of the synthetic resin sheet 3 and the upper part of the synthetic resin sheet 3 is covered by the lid chamber 16.
Then, the entire synthetic resin sheet 3 is heated. In this case, the sheet is heated to about 105 ° C. to 135 ° C. slightly lower than the melting temperature of the synthetic resin sheet 3 in the example.

As the temperature rises, the synthetic resin sheet 3 softens,
Since the central portion of the synthetic resin sheet 3 hangs down on the inner diameter side of the clamp frame 12 (see the two-dot chain line in FIG. 4A), the stopper valve 15a is opened (the other stopper valve 1).
4a is closed), and the softened synthetic resin sheet 3 is held so as to be substantially horizontal by injecting compressed air into the chamber box 11.

Next, as shown in FIG. 4 (b), the elevator 13 is raised in the chamber box 11, and stopped just before the upper surface of the base member 2 on which the upper surface almost contacts the synthetic resin sheet 3. Let it. Next, as shown in FIG. 4B, the stopper valve 15a is closed, and the other stopper valve 14a is opened, and the pressure in the chamber box 11 is reduced to the atmospheric pressure or less (vacuum). Thereby, when the central portion of the synthetic resin sheet 3 in a substantially molten state comes into close contact with the upper surface (flat surface 2 a) of the base member 2, air flows in four directions of the base member 2 through the deaeration passage of the adhesive layer 6. Escape to
Adhesion can be performed so that air bubbles do not remain on the flat surface 2a.
From the back to the vicinity of the back surface.

Thereafter, after the pressure in the chamber box 11 is returned to the atmospheric pressure state or the like, the lid chamber 16 is removed, the four circumferences of the synthetic resin sheet 3 are removed from the clamp frame 12, and the four corners of the base member 2 are flat (surface). 3) The synthetic resin sheet 3 is pressed against the synthetic resin sheet 3 from the two curved surfaces at the four corners by pressing the synthetic resin sheet 3 from the 2a toward the side surface 2b with a soft roller 18.

As shown in FIGS. 5A and 5B,
When the side surface 2 b of the base member 2 has a complicated cross-sectional shape of a two-step convex curve, the synthetic resin sheet 3 is
By wrapping and pressing along the curved surface b, removal of wrinkles and close contact of the synthetic resin sheet 3 can be performed simultaneously. The remaining portions of the four circumferences of the synthetic resin sheet 3 may be cut off by a cutter or the like in a later step (after cooling).

The synthetic resin sheet 3 of the present invention comprises a base member 2
In this case, the adhesive layer is adhered by a pressure-sensitive adhesive layer having a low adhesive strength, and is adhered by vacuum molding, and is rolled up to the side surface 2b of the base member 2 so as to be pressed and adhered. If the base sheet 4 is laminated with a plurality of polyolefin sheets so that the injection molding directions thereof intersect each other, the stretchability of the single sheet is different in the vertical and horizontal directions, but the stretchability in the vertical and horizontal directions is low. As a result of uniformity, dimensional stability is also good, and one side does not tear at the time of peeling, and it is adhered with an adhesive instead of an adhesive, so the separation work with the base member at the time of disposal is This has the effect of being easy.

The polyolefin resin does not generate dioxin during incineration, so that it has no problem of environmental pollution and is suitable for material recycling. Needless to say, the furniture of the present invention can be applied not only to a table top such as a table but also to a shelf device, a case body of a cabinet, and the like. The present invention has been made in order to solve the above-mentioned conventional technical problem, and provides a surface plate structure for furniture having high mechanical strength, high impact resistance, and good dimensional stability. The purpose is to do so.

[0022]

As described in detail above, the surface plate structure of the furniture according to the first aspect of the present invention is such that the synthetic resin sheet is formed on the surface of the base sheet made of a polyolefin sheet laminated in two or three layers. A surface sheet having wear resistance is laminated, an adhesive layer is applied to the back surface of the base material sheet, and the synthetic resin sheet is integrally adhered to the front side and the side surface of the base member in furniture such as a table. Since the synthetic resin sheet integrally covers the base member from the wide flat surface to the side surface, the appearance is improved.

Further, since the adhesive is adhered by the adhesive instead of the adhesive, the effect of separating and separating the synthetic resin sheet and the base member at the time of disposal becomes easy.
Furthermore, polyolefin resins do not generate dioxins during incineration, so they have no environmental pollution problem and are suitable for material recycling. According to a second aspect of the present invention, in the furniture surface plate structure according to the first aspect, since the base sheet is formed by laminating random or homopolyolefin sheets on the upper and lower surfaces of an amorphous polyolefin sheet, Stability is improved. And, since a printing layer or an aluminum sheet is interposed between the front side of the base sheet and the top sheet, the printing layer such as a grain pattern does not come out on the surface in contact with other articles and does not peel off. Durability is improved, and heat resistance is improved when an aluminum sheet is inserted. Further, since the pressure-sensitive adhesive layer on the back surface side of the base sheet is patterned so as to have a deaeration passage, when the synthetic resin sheet is adhered to the surface of the base member, bubbles may remain therebetween. There is no adhesion and the adhesion is improved.

According to a third aspect of the present invention, in the method of manufacturing a surface plate for furniture, the synthetic resin sheet in a heated state is brought into vacuum contact with a surface and a side surface of a base member of furniture arranged in a vacuum forming machine. After that, the base member is wrapped and pressed on at least the side surface of the base member having a three-dimensional curved surface. Therefore, even if the side surface of the base member is a three-dimensional curved surface such as a convex curved surface, the base member can be adhered to the surface and side surfaces of the base member with high adhesion, and the synthetic resin sheet adheres to the convex curved surface without wrinkles. The effect that it can be made to play is produced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a desk top plate to which the present invention is applied.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view of a synthetic resin sheet.

FIG. 4 (a) is an explanatory view showing a state where a synthetic resin sheet is heated by a vacuum forming apparatus in a pressurized state from below,
(B) is an explanatory view of a state where the base member is raised, (c).
FIG. 4 is an explanatory view showing a state in which a synthetic resin sheet softened by generating a vacuum is brought into vacuum contact with a base member.

5A is a cross-sectional view illustrating an initial state of a winding operation of a synthetic resin sheet by a roller when the side surface of the base member has a two-step convex curved surface, and FIG. 5B is an end state of the winding operation by the roller; It is sectional drawing which shows a state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top board 2 Base member 2a Surface 2b Side surface 3 Synthetic resin sheet 4 Base material sheet 5 Surface sheet 6 Adhesive layer 7 Printing layer 11 Chamber box 12 Clamp frame 13 Lifting table 14 Vacuum pipe 15 Intensifier pipe 16 Cover room 17 Heater 18 roller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsushi Fukuhara 1-4-12 Imafukuhigashi, Joto-ku, Osaka-shi Inside Itoki Crebio Co., Ltd. (72) Inventor Akihiro Maruyama 3-7-1 Sotokanda, Chiyoda-ku, Tokyo No. Vegan Trading Co., Ltd. (72) Inventor Takayuki Miura 6-6-26 Hishiya Nishi, Higashiosaka-shi, Osaka Fuse Vacuum Co., Ltd. F-term (reference) 4F100 AB01 AB10A AK03A AK03B AK03C AK03J AK07 AK69 AK70 AL01B AP03 AR00D AT00E BA04 BA05 BA07 BA10D BA10E BA13 CB05 DD01 EJ192 EJ242 EJ422 EJ432 GB81 HB01 HB31A JA12A JA12C JD02 JJ03 JK06 JK09D JL00 JL14 JL16 4F211 AA03 AA03 SA03 A03A01 A03A03 A03A03 A03A03 A03A03 A03 SP04 SP17 SP26

Claims (3)

[Claims] 1. A synthetic resin sheet is prepared by laminating a surface sheet having abrasion resistance on the surface of a base sheet composed of a polyolefin sheet laminated in two or three layers, and applying an adhesive layer on the back surface of the base sheet. A surface plate structure for furniture, wherein the synthetic resin sheet is integrally adhered to a surface side and a side surface of a base member of furniture such as a table. 2. The base sheet is formed by laminating random or homopolyolefin sheets on the upper and lower surfaces of an amorphous polyolefin sheet, and a printing layer or an aluminum sheet is interposed between the front side of the base sheet and the top sheet. 2. The front plate structure of furniture according to claim 1, wherein the adhesive layer on the back side of the base sheet is patterned so as to have a deaeration passage while being inserted. 3. 3. The heated synthetic resin sheet is brought into vacuum contact with the surface and side surfaces of a base member of furniture arranged in a vacuum forming machine, and then wound around at least a side surface of the base member having a three-dimensional curved surface. A method for manufacturing a surface plate structure in furniture, comprising pressing.